switch to go vendoring

vendor/github.com/open-policy-agent/opa/version/version.go

@@ -0,0 +1,27 @@
+// Copyright 2016 The OPA Authors.  All rights reserved.
+// Use of this source code is governed by an Apache2
+// license that can be found in the LICENSE file.
+
+// Package version contains version information that is set at build time.
+package version
+
+import (
+	"runtime"
+)
+
+// Version is the canonical version of OPA.
+var Version = "0.51.0"
+
+// GoVersion is the version of Go this was built with
+var GoVersion = runtime.Version()
+
+// Platform is the runtime OS and architecture of this OPA binary
+var Platform = runtime.GOOS + "/" + runtime.GOARCH
+
+// Additional version information that is displayed by the "version" command and used to
+// identify the version of running instances of OPA.
+var (
+	Vcs       = ""
+	Timestamp = ""
+	Hostname  = ""
+)